PLANTS OF IOWA 



247 



Surirelloideae 84 



Sullivantia 175 



Sychytrieae 22 



Symphoricarpos 219 



Synchitrium 22 



Syndesmon 167 



Synosma 235 



Syntherisma 129 



Synthris 214 



Tabellaria 84 



Tabellatiaceae 84 



Tamidia 199 



Talimim : 163 



Tanacetum 234 



Taphrina 27 



Taraxacum 221 



Taxaceae 125 



Taxus 125 



Tecoma 216 



Tetraspora 88 



Tetacedon 88 



Teucrium 208 



Thalcsia 216 



Thallophytes 7 



Thaspium 199 



Thecaphora 54 



Thalictrum 169 



Theloscristes 96 



Thelepboraceae 70 



Thelia 117 



Thelypodium 170 



Thlaspi 171 



Thuidium 118 



Thymeleaceae 195 



Thyridium 33 



Tilmadoche 9 



Tilletia 54 



Tilia 192 



Timmia 116 



Titiaceae 192 



Tolyposporium 53 



Toxylon 158 



Tradescantia 148 



Tragopogon 221 



Trametes 68 



Tribonemaceae 85 



Triostreum 219 



Tripsacum 128 



Trichesphaerieae 31 



Tribonema 85 



Triglochin 127 



Tricuspis 135 



Trichloma 71 



Trichopeziza 43 



Triphora 153 



Triadenum 193 



Trif olium 182 



Triplasis 135 



Tribulus 187 



Trichia 15* 



Trillium 151 



Trichiaceae 13 



Tuberculariaceae 51 ' 



Tubifera 12" 



Tulostoma 75> 



Tulostomeae 75 



Typha 125 



Typhacese 125- 



Ulmus 157 



Ulmaria 178 



Ulmacese 157 



Ulotrichaceae 92 



Ulothrix 92 



Umbellif erae 198 



TJncinula 29 



Uniola 136 



Unif olium 151 



Urceolaria 103 



Uredinese 55 



Uredo 61 



Urnula 46 



Urocystis 55 



Uromyces 56 



Urtica - 158 



Urticaceae 158 



Urticastrum 158 



Usneei 95 



Usnea 95 



Ustilago 51 



Ustilagineae 51 



Ustulina 36 



Utricularia 216 



Uvularia 149 



Vaccaria 164 



Vacciniacese 201 



Vaccinium 201 



Valsa 33 



Valerianella 220 



Vallisneriaceae 128 



Vallisneria 128 



Valsaria 35 



Valseae 33 



Vaucheriaceae 91 



Vaucheria 91 



Venturia 31 



Veratrum 149 



Verbascum 213 



Verbena 208 



Veronia 223" 



Verbenaceae 208 



Verbesina 232" 



Vermicularia 47 



Veronica 214 



Verrucariei 109 



Verrucaria 109 



Viburnum 219 



Vibrissea 38 



Vicia 185 



